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K. Koyama

5 papers hereh-index 5120 citations6 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position
  • first author2
  • middle author1

Across the 3 of 5 papers where every author was matched, so the position is known.

fields
  • astro-ph.HE3
  • astro-ph2
same name
  • K. Koyama — 235 papers, h 74
  • K. Koyama — 176 papers, h 53
  • K. Koyama — 14 papers, h 5
  • K. Koyama — 12 papers, h 27
  • K. Koyama — 12 papers, h 3
  • K. Koyama — 11 papers

Either other researchers who publish under this name, or the same person where the external sources have not merged their records.

identity via Semantic Scholar / OpenAlex

activity
20002024
most citedUnusual Properties of X-Ray Emission near the Galactic Center

29 citations · 33 across the 5 of their papers we have counts for

collaborators

4 papers

astro-ph.HE2024

Origin and Composition of the Galactic Diffuse X-Ray Emission Spectra by Unresolved X-Ray Sources

Katsuji Koyama, Masayoshi Nobukawa

The Galactic diffuse X-ray emission (GDXE) can be spatially segmented into the Galactic center X-ray Emission (GCXE), the Galactic ridge X-ray emission (GRXE), and the Galactic bul…

astro-ph.HE2015★ 1 cited

Enhancement of the 6.4 keV line in the inner Galactic ridge: Proton-induced fluorescence?

K. K. Nobukawa, M. Nobukawa, H. Uchiyama +7

A common idea for the origin of the Galactic diffuse X-ray emission, particularly that of the iron lines from neutral and highly ionized atoms, is a superposition of many cataclysm…

astro-ph2007★ 2 cited

X-Ray Observations of the Galactic Center with Suzaku

K. Koyama, Y. Hyodo, T. Inui +2

We report on the diffuse X-ray emissions from the Galactic center (GCDX) observed with the X-ray Imaging Spectrometer (XIS) on board the Suzaku satellite. The highly accurate energ…

astro-ph2000★ 29 cited

Unusual Properties of X-Ray Emission near the Galactic Center

Y. Tanaka, K. Koyama, Y. Maeda +1

The X-ray spectrum in a 1∘×1∘ region of the Galactic center observed with the ASCA satellite is examined in detail, following the first report by Koyama et al.…

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Not affiliated with arXiv. Researcher data from Semantic Scholar (ODC-BY) and OpenAlex.